X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/e75e8815757816135722ee8c8c144979449b14a7..12bb29f5432174ecbd65549bda832d70d34a98ae:/src/generic/wizard.cpp

diff --git a/src/generic/wizard.cpp b/src/generic/wizard.cpp
index d8dbd11137..60d8fa754b 100644
--- a/src/generic/wizard.cpp
+++ b/src/generic/wizard.cpp
@@ -83,6 +83,7 @@ private:
 
 wxDEFINE_EVENT( wxEVT_WIZARD_PAGE_CHANGED, wxWizardEvent );
 wxDEFINE_EVENT( wxEVT_WIZARD_PAGE_CHANGING, wxWizardEvent );
+wxDEFINE_EVENT( wxEVT_WIZARD_BEFORE_PAGE_CHANGED, wxWizardEvent );
 wxDEFINE_EVENT( wxEVT_WIZARD_CANCEL, wxWizardEvent );
 wxDEFINE_EVENT( wxEVT_WIZARD_FINISHED, wxWizardEvent );
 wxDEFINE_EVENT( wxEVT_WIZARD_HELP, wxWizardEvent );
@@ -792,6 +793,13 @@ void wxWizard::OnBackOrNext(wxCommandEvent& event)
 
     bool forward = event.GetEventObject() == m_btnNext;
 
+    // Give the application a chance to set state which may influence GetNext()/GetPrev()
+    wxWizardEvent eventPreChanged(wxEVT_WIZARD_BEFORE_PAGE_CHANGED, GetId(), forward, m_page);
+    (void)m_page->GetEventHandler()->ProcessEvent(eventPreChanged);
+
+    if (!eventPreChanged.IsAllowed())
+        return;
+
     wxWizardPage *page;
     if ( forward )
     {